Plant guide
Fast-growing aquarium plants
Fast-growing plants absorb nitrates and phosphates more quickly than slow growers, which makes them useful in a newly cycled tank, after a heavy fish load, or when battling algae. Hornwort and Duckweed are the fastest in this library. The trade-off is frequent trimming: a stem plant that grows 5–10 cm per week will need cutting back every two weeks or it will shade out everything below it.
9 fast growers for nitrate uptake and algae competition — plan for trimming.
How to read this list
Fast growth buys nitrate uptake and algae competition — and a trimming schedule. Plan weekly scissors time, or the top of the tank will shade everything below it within a month.
Amazon Frogbit
Limnobium laevigatum
easymedium lightNo CO2
Roots provide cover and biofilm for shrimp and fry. Trim regularly so it does not block all light. Needs surface agitation to be gentle, strong spray bars will push it around and stunt growth. Good for bettas and shy surface fish.
Brazilian Pennywort
Hydrocotyle leucocephala
easymedium lightNo CO2
Can be grown planted or floating, floating growth is fastest. Trim frequently. Leaves are distinctive and add visual interest to mid or background zones. Low maintenance and adapts to a wide range of conditions.
Duckweed
Lemna minor
easylow lightNo CO2
Good for tanks with goldfish or other herbivores that will eat it as food. Nearly impossible to fully eradicate, only introduce if you accept a permanent presence. Skimmer/overflow tanks spread it fast.
Hornwort
Ceratophyllum demersum
easylow lightNo CO2
Can be floated or loosely planted; will shed needles when conditions change. Trims frequently, cut the top growth and replant. Good for cycling tanks due to high nutrient uptake.
Hygrophila Polysperma
Hygrophila polysperma
easylow lightNo CO2
Almost impossible to kill. Trim frequently, it becomes a jungle fast. Plant cuttings directly in substrate. Good for giving a new tank a head start on nutrient cycling.
Rotala Rotundifolia
Rotala rotundifolia
easymedium lightNo CO2
Plant in bunches; trim the tops and replant for a bushy background. Higher light will bring out red/orange colouring. Easy to propagate from cuttings.
Vallisneria
Vallisneria spiralis
easymedium lightNo CO2
Do not bury the crown. Plant individual runners in sand or fine gravel. Fast-spreading: thin runners regularly to prevent them from overtaking the tank. Good option for alkaline tap water setups.
Water Sprite
Ceratopteris thalictroides
easymedium lightNo CO2
Works planted or floating. Floating growth is faster; planted stems stay upright in fine substrate. Produces numerous plantlets, trim or remove excess to prevent it blocking all surface light.
Water Wisteria
Hygrophila difformis
easymedium lightNo CO2
Plant stems in bunches in substrate. Trims easily, replant cuttings directly. Leaf shape varies with light: broad and simple in low light, finely divided in brighter conditions.
Plan the hardscape next
Shortlist plants here, then set litres and livestock in the builder before you buy.
Need filtration context for a planted tank? See the filter size guide.
Other plant guides
Easy beginner aquarium plantsLow-light aquarium plantsAquarium carpet plantsPlants for shrimp tanksPlants that grow without CO2
Fast-growing aquarium plants — quick answers
- What does the “Fast-growing aquarium plants” list include?
- 9 fast growers for nitrate uptake and algae competition — plan for trimming.
- How should I use this plant list before buying?
- Treat it as a shortlist from structured library fields, not a buy list. Open each profile for light, CO2, and placement, then plan hardscape and filtration before you add livestock.
- Which plants appear on this guide right now?
- Examples currently matching include Amazon Frogbit, Brazilian Pennywort, Duckweed, Hornwort, plus 5 more. Counts change as the library grows.